Consider the following scenario.
You upgrade to Office 2016 on your computer.
When you use OneDrive for Business, your libraries stop syncing, and the icon overlays don't appear on synchronized files and folders.
To resolve this issue, follow these steps:
Manually start the OneDrive for Business desktop app through the Start menu.
Restart the computer.
NOTE: After you restart your computer, you shouldn't have to manually start OneDrive for Business again. The OneDrive for Business desktop app should start on its own and then sync your libraries.
This is a known issue. This issue occurs because OneDrive for Business doesn't restart after you install Office 2016.
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